Dozens of police
departments nationwide are gearing up to use a tech company's already
controversial iris- and facial-scanning device that slides over an
iPhone and helps identify a person or track criminal suspects.

The so-called "biometric"
technology, which seems to take a page from TV shows like "MI-5" or
"CSI," could improve speed and accuracy in some routine police work in
the field. However, its use has set off alarms with some who are
concerned about possible civil liberties and privacy issues.